The 24 hours self-check-in makes it possible to arrive at any time of the day or night without having any stress. The key will be put into the safe and the key for the safe (which will stay the same for your whole stay) will be sent to you via text message in time. Whenever you leave the house, you can put the key into the safe for yourself or any other family members. A manual key for any cases of emergency (e.g. a power cut) is also deposited.